Free Powerpoint Presentations

Radiation Safety and Operations
Page
2

DOWNLOAD

WATCH ALL SLIDES

Slide 10

Half Life Calculation

Half Life Calculation

Most medical isotopes (like Technicium-99m) last only a few days

Slide 11

Some Isotopes & Their Half Lives

Some Isotopes & Their Half Lives

Slide 12

The Amount of Radioactivity is NOT Necessarily Related to Size

The Amount of Radioactivity is NOT Necessarily Related to Size

Specific activity is the amount of radioactivity found in a gram of material.

Radioactive material with long half-lives have low specific activity.

1 gram of Cobalt-60 has the same activity as 1800 tons of natural Uranium

Slide 13

Alpha Particles: 2 neutrons and 2 protons

Alpha Particles: 2 neutrons and 2 protons

They travel short distances, have large mass

Only a hazard when inhaled

Four Primary Types of Ionizing Radiation: Alpha Particles

Slide 14

Four Primary Types of Ionizing Radiation: Beta Particles

Four Primary Types of Ionizing Radiation: Beta Particles

Beta Particles: Electrons or positrons having small mass and variable energy. Electrons form when a neutron transforms into a proton and an electron or:

Slide 15

Four Primary Types of Ionizing Radiation: Gamma Rays

Four Primary Types of Ionizing Radiation: Gamma Rays

Gamma Rays (or photons): Result when the nucleus releases

Energy, usually after an alpha, beta or positron transition

Slide 16

Four Primary Types of Ionizing Radiation: X-Rays

Four Primary Types of Ionizing Radiation: X-Rays

X-Rays: Occur whenever an inner shell orbital electron is removed

and rearrangement of the atomic electrons results with the release of

the elements characteristic X-Ray energy

Slide 17

Four Primary Types of Ionizing Radiation: Neutrons

Four Primary Types of Ionizing Radiation: Neutrons

Neutrons: Have the same mass as protons but are uncharged

They behave like bowling balls

Slide 18

Four Primary Types of Ionizing Radiation

Four Primary Types of Ionizing Radiation

Alpha particles

Beta particles

Gamma rays (or photons)

X-Rays (or photons)

Neutrons

Slide 19

Four Primary Types of Ionizing Radiation

Slide 20

Shielding for ,  and 

Shielding for ,  and 

BASIC CONCEPT is to:

Place materials between the source and person to absorb some or all of the radiation

Slide 21

Go to page:
 1  2  3  4  5  6 

Contents

Last added presentations

2010-2019 powerpoint presentations